Chapter 25. M32R Dependent Features

149

unknown instruction ...

This message is produced when the assembler encounters an instruction which it does not recog 

nise.

only the NOP instruction can be issued in parallel on the m32r

This message is produced when the assembler encounters a parallel instruction which does not

involve a NOP instruction and the

 m32rx

command line flag has not been specified. Only the

M32Rx processor is able to execute two instructions in parallel.

instruction ... cannot be executed in parallel.

This message is produced when the assembler encounters a parallel instruction which is made up

of one or two instructions which cannot be executed in parallel.

Instructions share the same execution pipeline

This message is produced when the assembler encounters a parallel instruction whoes compo 

nents both use the same execution pipeline.

Instructions write to the same destination register.

This message is produced when the assembler encounters a parallel instruction where both com 

ponents attempt to modify the same register. For example these code fragments will produce this

message:

mv r1, r2 || neg r1, r3 jl r0 || mv r14, r1 st r2, @ r1 || mv r1,

r3 mv r1, r2 || ld r0, @r1+ cmp r1, r2 || addx r3, r4

(Both write to the condi 

tion bit)